銅の熔錬に関する研究 (第1報)

FeS-FeO-SiO₂系の液相面について

抄録

The ternary system FeS-FeO-SiO₂ was investigated from the stand point of non-ferrous metallurgy and its partial liquidus diagram was derived experimentally. Significant features of the diagram are the existence of three types of fields at about 1200°C, viz., the field in which a single phase of melt is present, the one in which two liquid phases coexist, and the one in which a solid phase exists together with melts. The location of the miscibility gap and the tie-line across it indicate that the matte in this system dissolves a considerable amount of wiistite, white the slag dissolves a certain amount of ferrous sulphide. Effects of some additions on the matte and the slag in equilibrium with solid silica. were examined. From these results, the addition of CuBS, CaO, and Al₂0₃ was found to reduce the mutual solubility between matte and slag. The significance of the diagram in the field of copper metallurgy was explained by citing some examples.